* new function - fsync_bdev() (analog of fsync_dev(), but takes
struct block_device * instead of kdev_t. Callers of fsync_dev()
that have struct block_device in question are using fsync_bdev()
now.
* old code for fsync_dev(NODEV) had been moved to sys_sync().
Other callers of fsync_dev(NODEV) are calling sys_sync() now.
* fsync_dev() became a wrapper fro fsync_bdev().
* sync_dev() (not used anywhere in the tree) is gone.
* i2oblock.c had fsync_dev() called in ->release(). Removed.
* s390/block/xparm.c was doing fsync_dev() on its devices in
cleanup_module(). Removed.